After the founding of the Huaxing Society, Hu Ying and Song Jiaoren began planning the establishment of a revolutionary organization in Hubei.
They secretly set up the "Science Supplementary School" as a front to deceive the authorities, while actually using it to lay the groundwork for the revolutionary movement in Wuchang.
Initially enrolling in the Army Officer School, Hu Ying later transferred to the Faculty of Political Economy at Waseda University.
The revolutionary activities of the Hubei New Army were not accidental, and key figures such as Liu Jing'an, Hu Ying, and Song Jiaoren played crucial roles in organizing the movement.
In December, Hu Ying was appointed by Li Yuanhong to accompany the Qing government's representative, Tang Shaoyi, to Shanghai to participate in negotiations between the North and South.
Yuan Shikai appointed Zhang Guangjian as the Governor of Shandong, which led to a conflict between him and Hu Ying, who angrily resigned but stayed in Yantai.
Hu Ying joined the Kuomintang organized by Song Jiaoren and was elected a senator in the Republic of China's National Assembly.
The following year, in August, Hu Ying, along with Huang Xing and Li Genyuan, organized the European Affairs Research Society.
In August 1915, Hu Ying, Yang Du, Sun Yujun, Yan Fu, Liu Shipai, and Li Xiehe formed the Preparatory Committee for the Annuity Fund, supporting Yuan Shikai's attempt to become emperor.
Following the outbreak of the Constitutional Protection War, in December 1917, Hu Ying suddenly assumed the position of Pacification Commissioner and Commander of the Vanguard in western Hunan, leading troops to attack Hubei.
[12] After the National Revolutionary Army launched the Northern Expedition, Hu Ying served as the representative of Yan Xishan in Nanjing.